diff --git a/lib/common/collections/wp_users/detectable.rb b/lib/common/collections/wp_users/detectable.rb
index 8eca7466..929b9b0e 100755
--- a/lib/common/collections/wp_users/detectable.rb
+++ b/lib/common/collections/wp_users/detectable.rb
@@ -3,10 +3,23 @@
 class WpUsers < WpItems
   module Detectable
 
+    # @return [ Hash ]
     def request_params; {} end
 
-    # options:
-    #   :range - default 1..10
+    # No passive detection
+    #
+    # @return [ WpUsers ]
+    def passive_detection(wp_target, options = {})
+      new
+    end
+
+    protected
+
+    # @param [ WpTarget ] wp_target
+    # @param [ Hash ] options
+    # @option options [ Range ] :range ((1..10))
+    #
+    # @return [ Array<WpUser> ]
     def targets_items(wp_target, options = {})
       range   = options[:range] || (1..10)
       targets = []
@@ -17,11 +30,5 @@ class WpUsers < WpItems
       targets
     end
 
-    # No passive detection
-    # @return [ WpUsers ]
-    def passive_detection(wp_target, options = {})
-      new
-    end
-
   end
 end
diff --git a/lib/common/models/wp_user.rb b/lib/common/models/wp_user.rb
index 44e8fe34..6e549622 100755
--- a/lib/common/models/wp_user.rb
+++ b/lib/common/models/wp_user.rb
@@ -18,6 +18,14 @@ class WpUser < WpItem
     end
   end
 
+  # @return [ String ]
+  def to_s
+    s  = "#{id}"
+    s += " | #{login}" if login
+    s += " | #{display_name}" if display_name
+    s
+  end
+
   # @param [ WpUser ] other
   def <=>(other)
     id <=> other.id
diff --git a/spec/lib/common/collections/wp_users/detectable_spec.rb b/spec/lib/common/collections/wp_users/detectable_spec.rb
new file mode 100644
index 00000000..c3581f92
--- /dev/null
+++ b/spec/lib/common/collections/wp_users/detectable_spec.rb
@@ -0,0 +1,59 @@
+# encoding: UTF-8
+
+require 'spec_helper'
+require WPSCAN_LIB_DIR + '/wp_target'
+
+describe 'WpUsers::Detectable' do
+  subject(:wp_users)   { WpUsers }
+  let(:wp_content_dir) { 'wp-content' }
+  let(:wp_plugins_dir) { wp_content_dir + '/plugins' }
+  let(:wp_target)      { WpTarget.new(url, wp_content_dir: wp_content_dir, wp_plugins_dir: wp_plugins_dir) }
+  let(:url)            { 'http://example.com/' }
+  let(:uri)            { URI.parse(url) }
+
+  def create_from_range(range)
+    result = []
+
+    range.each do |current_id|
+      result << WpUser.new(uri, id: current_id)
+    end
+    result
+  end
+
+  describe '::request_params' do
+    it 'return an empty Hash' do
+      subject.request_params.should === {}
+    end
+  end
+
+  describe '::passive_detection' do
+    it 'return an empty WpUsers' do
+      subject.passive_detection(wp_target).should == subject.new
+    end
+  end
+
+  describe '::targets_items' do
+    after do
+      targets = subject.send(:targets_items, wp_target, options)
+
+      targets.should == @expected
+    end
+
+    context 'when no :range' do
+      let(:options) { {} }
+
+      it 'returns Array<WpUser> with id from 1 to 10' do
+        @expected = create_from_range((1..10))
+      end
+    end
+
+    context 'when :range' do
+      let(:options) { { range: (1..2) } }
+
+      it 'returns Array<WpUser> with id from 1 to 2' do
+        @expected = create_from_range((1..2))
+      end
+    end
+  end
+
+end